Some of the commercial farmers here shear in late January then lamb in barns in Feb
. The ewes and lambs are out again within a couple of days. Not sure I like the method but it must be commercially viable.
Of course, there may be lamb / ewe losses, while remaining commercially viable.
I know I can't speak for all farmers, but at this point it is so not about the money.
You've planned your matings, cared for your ewes, agonised over feeding to help her grow good lambs, have plenty of milk, be in good condition to rear her lambs, but not to grow overlarge lambs and not to be fat; in the run up to and during lambing your whole being is concerned with keeping your girls fit, healthy and safe, and afterwards the lambs too... Of course overall the sale of lambs and cast ewes needs to make a profit, but that comes later when you sell. Right now, we're not thinking about money and any loss is very keenly felt. Perhaps not always with the personal connection with the sheep in question that a small flockkeeper would feel, but even with big numbers every loss feels like a stab in the chest that we didn't do enough, failed in our care, failed that ewe who depended upon us.
So forgive me Rosemary, but I take issue with the implication that big farmers take calculated risks with ewe and lamb lives heartlessly, on the basis of financial gain.